Universal coupling.



F. J. WALLING.

UNIVERSAL COUPLING.

ICATION HLED JAN. 6,]

\ Patented Nov. 26, 1918.

ieeaeae.

filing, the same havin snares onnron FREDERICK J. WALKING, 0F LQMAX, IL'LLINQIS.

UNIVERSAL UOUPLIHG.

Specification of Letters ratent.

Patented Nov 2%, 31918.

Application filed January 6, 1917. Serial. filo. l ltifitm.

To all whom it may concern:

Be it known that l, FREDERICK J. WALL= ING, a citizen of the United States, residing at Loinax, in the State of lllinois, have invented certain new and useful improvements in Yniversal Couplings; and i do hereby de-' clare the following tobe a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My present invention relates to an improved process of making clamping rings for pipe couplings and the like, and to such ends, the invention consists of the novel operations hereinafter described and defined in the claim.

The invention is illustrated in the accompanying drawings wherein like character'sindicate like parts throughout the several views. Referring to the drawings:

Figure l is a plan view showing acoupling having my improved clamping sleeve applied thereto;

Fig. 2 shows the coupling in central longitudinal section; I

Fig. 3 is a plan view of the blank from which the clamping ring is made;

Fig. 4.- is a plan view showing the clamping ring as it appears after the second step of the process for producing the same; v

Fig. 5 is a section on the line 5-5 of Fig. 4, but showin the ring as it would appear after the third step of the process;

Fig. 6 is a plan view showing the ring as it would appear after the fourth step of the operation; and

Fig. 7 shows the complete ring in side elevation. 1

The numerals 8 and 9 indicate the coopcrating hollow heads or members of the couoblique faces. The

sad 9 is externally t readed at 10 and is provided with an inset annular-seat 11, preferably of lead or other metal that is softer than the metal of the heads 8 and 9, the said heads being usually cast of gray iron. The head 8 is provided with an outstanding flange 12 and with a rounded annular end 13, which latter closely fits the concavity of the seat 11. The completed clamping ring is indicated, as an entirety, by the numeral 14. It is internally threaded for engagement with the threads 10 of the head 9 and is provided with an inturned flange 14 that bears against the outstanding flange 12 of the head 8.

The process of producing this clamping ring is as follows:

h irst, from a metal sheet or plate, preferably of rolled steel, a disk is stamped, as shown in diameter that it will form the body and dan e of the completed ring.

Second, the dish of Fig. 3 is pressed'into cup shape form shown in Figs. i and 7 and the web thereof has a square orangular axial perforation a punched therein.

Third, the internal threads are out in the cylindrical flange of the ring, as shown in Fig. 5, and in perfo'rmin this operation, the square perforation aper orrns an important function, to-wit, it is adapted to be engaged by the jaws of a chuck or mandrel, to thereby properly center the ring in the cutting of the internal threads without requiring the cylindrical flange of the said ring ,to be clamped in a chuck. Here it may be stated that,in practice, it has been found that the This disk must have such cylindrical flange of the ring cannot be perforation b, as is evident, has alargerdiameter than the extreme or greatest dimensions of the angular perforation a so that the latter entirely disappears in the finished ring. The'perforations a and b, of course, may be produced b punching. The perforation a may be pro uced by an individual action, or at the same time that the disk of Fig. 3 is being pressed to the form shown in Fig. 4:.

In practice, it has been found that these rendering the threads inclamping rings may be produced by the im- I proved process at a much less cost than they can be cast, and furthermore, that they are much more durable, lighter strongergandin every way, better than a cast ring. Also, they have a neater appearance than a cast ring.

What I claim is:

The process of producing a clamping ring of the kind described which consists, first in cutting a disk from :1 sheet of metal, sec- 5 0nd in pressing the disk into cup shape form and forming therein an angular axial perforation; third in cutting internal threads in the cylindrical portion of said ring, and fenrth, in cutting from the Web of said ring a circular perforatien of at 10 least as large diameter as the extreme dimensions of the said angular perforation.

In testimony whereof 1 ex my signature in presence of two witnesses.

FREDERICK J". WALLING. Witnesses: CLARA DEMAREST, F. D" MERCHANT. 

